set terminal attributes (stty)

display or change terminal characteristics.
> stty -a
speed 9600 baud; rows 33; columns 132; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = ; eol2 = ; swtch = ; start = ^Q; stop = ^S;
susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd cs8 -hupcl -cstopb cread -clocal -crtscts -cdtrdsr
-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff -iuclc ixany imaxbel -iutf8
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe -echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke

> stty --h
Usage: stty [-F DEVICE] [--file=DEVICE] [SETTING]...
  or:  stty [-F DEVICE] [--file=DEVICE] [-a|--all]
  or:  stty [-F DEVICE] [--file=DEVICE] [-g|--save]

  -a, --all          display all current settings in human-readable form
  -g, --save         display all current settings in a stty-readable form
  -F, --file=DEVICE  open and use the specified DEVICE instead of stdin
      --help     display this help and exit
      --version  output version information and exit

- before SETTING indicates negation.  

non-POSIX are in this font/color

The underlying system defines which settings are available. Special characters: eof send an end of file (terminate the input) eol end the line eol2 alternate for ending the line erase erase the last character typed intr send an interrupt signal (see trap kill erase the current line lnext enter the next character quoted(literly) quit send a quit signal rprnt redraw the current line start restart the output after stopping it stop stop the output susp send a terminal stop signal dsusp send a terminal stop signal once input flushed swtch switch to a different shell layer werase erase the last word typed Notice that there is no status key Special settings: N set the input and output speeds to N baud ispeed N set the input speed to N ospeed N set the output speed to N speed display the terminal speed cols N tell the kernel that the terminal has N columns columns N same as cols N rows N tell the kernel that the terminal has N rows size display the number of rows and columns according to the kernel line N use line discipline N time N with -icanon, set read timeout of N tenths of a second min N with -icanon, set N characters minimum for a completed read Control settings: [-]clocal disable modem control signals [-]cread allow input to be received [-]crtscts enable RTS/CTS handshaking (disables DTR/DSR) [-]cdtrdsr enable DTR/DSR handshaking (disables RTS/CTS), no stty readable form available, has to be supported by device csN set character size to N bits, N in [5..8] [-]cstopb use two stop bits per character (one with `-') [-]parenb generate parity bit in output and expect parity bit in input [-]parodd set odd parity (even with `-') [-]hup send a hangup signal when the last process closes the tty [-]hupcl same as [-]hup Input settings: [-]brkint breaks cause an interrupt signal [-]icrnl translate carriage return to newline [-]ignbrk ignore break characters [-]igncr ignore carriage return [-]ignpar ignore characters with parity errors [-]imaxbel beep and do not flush a full input buffer on a character [-]inlcr translate newline to carriage return [-]inpck enable input parity checking [-]istrip clear high (8th) bit of input characters [-]iutf8 assume input characters are UTF-8 encoded [-]iuclc translate uppercase characters to lowercase [-]ixany let any character restart output, not only start character [-]ixoff enable sending of start/stop characters [-]ixon enable XON/XOFF flow control [-]parmrk mark parity errors (with a 255-0-character sequence) [-]tandem same as [-]ixoff Output settings: (the delays are for printing terminals without a buffer) bsN backspace delay style, N in [0..1] crN carriage return delay style, N in [0..3] ffN form feed delay style, N in [0..1] nlN newline delay style, N in [0..1] tabN horizontal tab delay style, N in [0..3] tabs same as tab0 -tabs same as tab3 vtN vertical tab delay style, N in [0..1] [-]ocrnl translate carriage return to newline [-]ofdel use delete characters for fill instead of null characters [-]ofill use fill (padding) characters instead of timing for delays [-]olcuc translate lowercase characters to uppercase [-]onlcr translate newline to carriage return-newline [-]onlret newline performs a carriage return [-]onocr do not display carriage returns in the first column [-]opost postprocess output Local settings: [-]crterase echo erase characters as backspace-space-backspace crtkill kill all line by obeying the echoprt and echoe settings -crtkill kill echoctl and echok [-]ctlecho echo control characters in hat notation (^c) [-]echo echo input characters [-]echoctl [-]ctlecho [-]echoe [-]crterase [-]echok echo a newline after a kill character [-]echoke [-]crtkill [-]echonl echo newline even if not echoing other characters [-]echoprt echo erased characters backward, between `\' and '/' [-]icanon enable erase, kill, werase, and rprnt special characters [-]iexten enable non-POSIX special characters [-]isig enable interrupt, quit, and suspend special characters [-]noflsh disable flushing after interrupt and quit special characters [-]prterase [-]echoprt [-]tostop stop background jobs that try to write to the terminal [-]xcase with icanon, escape with \' for uppercase characters Combination settings: [-]LCASE [-]lcase cbreak -icanon -cbreak icanon crt echoe echoctl echoke dec echoe echoctl echoke -ixany intr ^c erase 0177 kill ^u [-]decctlq [-]ixany ek erase and kill characters to their default values evenp parenb -parodd cs7 -evenp -parenb cs8 [-]lcase xcase iuclc olcuc litout -parenb -istrip -opost cs8 -litout parenb istrip opost cs7 nl -icrnl -onlcr -nl icrnl -inlcr -igncr onlcr -ocrnl -onlret oddp parenb parodd cs7 -oddp -parenb cs8 [-]parity [-]evenp pass8 -parenb -istrip cs8 -pass8 parenb istrip cs7 cooked brkint ignpar istrip icrnl ixon opost isig icanon, eof and eol characters to their default values -cooked raw raw -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl -ixon -ixoff -iuclc -ixany -imaxbel -opost -isig -icanon -xcase min 1 time 0 -raw cooked sane cread -ignbrk brkint -inlcr -igncr icrnl -iutf8 -ixoff -iuclc -ixany imaxbel opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0 isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke, all special characters to their default values. Handle the tty line connected to standard input. Without arguments, displays baud rate, line discipline, and deviations from stty sane. In settings, CHAR is taken literally, or coded as in ^c, 0x37, 0177 or 127; special values ^- or undef used to disable special characters. Report bugs to

BSD solaris

stty -- set the options for a terminal device interface

stty [-a | -e | -g] [-f file] [operands ]

Sets or displays on terminal characteristics for the device that is its standard input.

Editor note: Many of these apply to terminals remotely connected serial communication lines and are not applicatable to console.
Most interesting operatnds which do apply to CONSOLE are:

isig, noflsh, size, rows, cols
Enable (disable generating signals if input contains special control characters
INTR (^? , QUIT (^U , and SUSP (^C.
Disable (enable flush of pending output after INTR, QUIT, or SUSP.
(do not send SIGTTOU for background output, causes background jobs to stop if they attempt terminal output.
(do not expand tabs to spaces on output.

If no options or operands are specified, it reports the settings of a subset of characteristics as well as additional ones if they differ from their default values.

speed 9600 baud;
lflags: echoe echoke echoctl pendin
oflags: -oxtabs
cflags: cs8 -parenb
-a Display all the current settings for the terminal to standard output as per IEEE Std 1003.2 (POSIX.2.

stty all|everything Reports all the terminal modes as with stty -a, except that the control characters are displayed in a columnar format.
 speed 9600 baud; 30 rows; 110 columns;
lflags: icanon isig iexten echo echoe -echok echoke -echonl echoctl
        -echoprt -altwerase -noflsh -tostop -flusho pendin -nokerninfo
iflags: -istrip icrnl -inlcr -igncr ixon -ixoff ixany imaxbel -iutf8
        -ignbrk brkint -inpck -ignpar -parmrk
oflags: opost onlcr -oxtabs -onocr -onlret
cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb -crtscts -dsrflow
        -dtrflow -mdmbuf
cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = ;
        eol2 = ; erase = ^?; intr = ^C; kill = ^U; lnext = ^V;
        min = 1; quit = ^\; redisplay = ^R; start = ^Q; status = ^T;
        stop = ^S; susp = ^Z; time = 0; werase = ^W; 
-e Display all the current settings for the terminal to standard output in traditional BSD all> format.
speed 9600 baud; 30 rows; 110 columns;
lflags: icanon isig iexten echo echoe -echok echoke -echonl echoctl
        -echoprt -altwerase -noflsh -tostop -flusho pendin -nokerninfo
iflags: -istrip icrnl -inlcr -igncr ixon -ixoff ixany imaxbel -iutf8
        -ignbrk brkint -inpck -ignpar -parmrk
oflags: opost onlcr -oxtabs -onocr -onlret
cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb -crtscts -dsrflow
        -dtrflow -mdmbuf
discard dsusp   eof     eol     eol2    erase   intr    kill    lnext   
^O      ^Y      ^D        ^?      ^C      ^U      ^V      
min     quit    redisplay start   status  stop    susp    time    werase  
1       ^\      ^R      ^Q      ^T      ^S      ^Z      0       ^W     
-f Open and use the terminal named by file rather than using standard input. The file is opened using the O_NONBLOCK flag of open(, making it possible to set or display settings on a terminal that might otherwise block on the open.

-g Display all the current settings for the terminal to standard output in a form that may be used as an argument to a subsequent invocation of stty to restore the current terminal state as per IEEE Std 1003.2 (``POSIX.2''.

Control Modes:
Affect hardware characteristics associated with the terminal, corresponds to the c_cflag in the termios structure.
nnnn Set terminal baud rate to nnnn. If zero, modem control is no longer asserted.
a communications line without (with modem control.
Enable (disable the receiver.
Enable (disable RTS/CTS flow control. (CRTs are fast enough to not need flow control).
cs5 cs6 cs7 cs8 Select character size in bits (cs7 most common.
Use two (one stop bits per character.
Stop asserting modem control (do not stop) asserting modem control on last close.
speed nnnn sets both ispeed and ospeed to nnnn.(examples 1200, 2400,4800 and 9600
ispeed nnnn Set terminal input baud rate . If zero, the input baud rate is set to the value of the output baud rate.
ospeed nnnn Set terminal output baud rate. If zero, modem control is no longer asserted.
Enable (disable) parity generation and detection.
Select odd (even parity.
-evenp -oddp and -parity.
evenp Enable parenb and cs7; disable parodd.
-oddp Same as -evenp and -parity.
oddp Enable parenb, cs7, and parodd.
-parity Disable parenb; set cs8.
parity Same as evenp.
pass8 The converse of parity.
Input Modes: This corresponds to the c_iflag in the termios structure.
Enable (disable input parity checking.
Mark (do not mark characters with parity errors.
Ignore (do not ignore characters with parity errors.
Ignore (do not ignore break on input.
Signal (do not signal INTR when system receives a break signal.
Map (do not map CR to NL on input.
Enable (disable icrnl. , -nl unsets inlcr and igncr.
Map (do not map NL to CR on input.
Ignore (do not ignore CR on input.
If imaxbel is set and the input queue limit has been reached, subsequent input causes the system to send an ASCII BEL character to the output queue (the terminal beeps .
If imaxbel is unset and the input queue is full, the next input character causes the entire input and output queues to be discarded!
Strip (do not strip input characters to seven bits.
input characters are UTF-8 encoded.
system sends (not send START/STOP characters (ASCII X-on/X-off when the input queue is nearly empty/full.
Output from the system is stopped when the system receives STOP and started when the system receives START( -ixon disables this
Allow any character to restart output.
Output Modes:
corresponds to c_oflag of the termios structure.
( some mechanical terminals, without buffering cannot perform so movements fast enough
bs0 bs1 style of delay for backspaces (e.g., set BSDLY to BS0.
cr0 cr1 cr2 cr3 style of delay for carriage returns (e.g., set CRDLY to CR0.
ff0 ff1 style of delay for form feeds (e.g., set FFDLY to FF0.
nl0 nl1 style of delay for newlines (e.g., set NLDLY to NL0.
tab0 tab1 tab2 tab3 style of delay for horizontal tabs (e.g., set TABDLY to TAB0.
Same as tab0 (tab3.
vt0 vt1 style of delay for vertical tabs (e.g., set VTDLY to VT0.
Use fill (x'00') characters (use timing for delays.
Use DELs (NULs) as fill characters.
Map (do not map CR to nl on output.
Map (do not map NL to CR-NL output.
On the terminal, NL performs (does not perform the CR function.
Do not (do output CRs at column zero.
Post-process output (do not post-process output; ignore all other output modes.
Expand (do not expand tabs to spaces on output. Local Modes: Local mode flags (lflags affect various characteristics of terminal processing. interpretation of the 'l' in lflag is ``line discipline flag'', which corresponds to the c_lflag of the termios structure.
do not echo back (do echo every character typed. Terminals in local mode have displayed the characters themselves..
Echo (do not echo NL after KILL character.
Echo (do not echo NL, even if echo is disabled. Some terminals position the "carriage" at position zero after a RETURN, but do not advance to the next line.
If set, echo control characters as ^X. Otherwise, control characters echo as themselves.
Same as echoctl.
The ERASE character shall (shall not visually erase the last character
Same as echoe.
Same as echoe.
The KILL character shall (shall not visually erase the current line
Same as echoke.
For displaying terminals. echo erased characters backwards within ``\'' and ``/''. Otherwise, disable this feature.
Indicates output is (is not being discarded.
Enable (disable canonical input (ERASE and KILL processing.
Enable (disable any implementation-defined special control characters that are not currently controlled by icanon, isig, ixoff, or ixon.
Enable (disable the checking of input for the special control characters INTR, QUIT, and SUSP.
Disable (enable flush after INTR, QUIT, or SUSP.
Send (do not send SIGTTOU for background output. This causes background jobs to stop if they attempt terminal output.
Use (do not use an alternate word erase algorithm when processing WERASE characters. which considers sequences of alphanumeric/underscores as words. It also skips the first preceding character in its classification (as a convenience, since the one preceding character could have been erased with simply an ERASE character.
If set, flow control output based on condition of Carrier Detect. Otherwise, writes return an error if Carrier Detect is low (and Carrier is not being ignored with the CLOCAL flag.
Indicates input is (is not pending after a switch from non-canonical to canonical mode and will be re-input when a read becomes pending or more input arrives.
Control Characters:
control-character string Set control-character to string. If string is a single character, the control character is set to that character. If string is the two character sequence "^-" or the string "undef" the control character is disabled (i.e. set to {_POSIX_VDISABLE}.
control-                                     control-
character    Subscript    Description        character    Subscript    Description
_________    _________    _______________     _________    _________    _______________
eof          VEOF         EndOfFile 
eol          VEOL         EndOfLine          eol2         VEOL2        EOL2 
erase        VERASE       ERASE              erase2       VERASE2      ERASE2 
werase       VWERASE      WERASE 
intr         VINTR        INTRupt 
kill         VKILL        KILL 
quit         VQUIT        QUIT 
susp         VSUSP        SUSPend 
start        VSTART       START               stop         VSTOP        STOP 
dsusp        VDSUSP       DSUSP 
lnext        VLNEXT       LNEXT 
redisplay      VREPRINT     REPRINT 
status       VSTATUS      STATUS   (INFO)
min number
time number Set the value of min or time to number. MIN and TIME are used in Non-Canonical mode input processing
Combination Modes: saved settings Set the current terminal characteristics to the saved settings produced by -g .
cols number Same as columns.
columns number The terminal size is recorded as having number columns.
Set (disable all modes suitable for a CRT display device.
Same as crt.
dec Set modes suitable for users of Digital Equipment Corporation systems (ERASE, KILL, and INTR are set to ^?, ^U, and ^C; ixany is disabled, and crt is enabled.
ek Reset ERASE, ERASE2, and KILL back to system defaults.
terminal processing is being performed by either the terminal hardware or by the remote side connected to a pty.
Enable (disable the system generated status line associated with processing a STATUS character (usually set to ^T. The status line consists of the system load average, the current command name, its process ID, the event the process is waiting on (or the status of the process, the user and system times, percent cpu, and current memory usage.
load: 3.64 cmd: bash 12892 waiting 0.00u 0.01s
waiting or running or uninterruptible
no input or output processing is performed. If unset, change the modes of the terminal to some reasonable state that performs input and output processing. unsetting raw may not put back all the setting that were previously in effect. To set the terminal into a raw state and then restore it
                 save_state=$(stty -g
                 stty raw
                 stty "$save_state"

rows number The terminal size is recorded as having number rows.
sane sets all modes to reasonable values
cooked Same as sane.
size window size is displayed rows columns.
tty Set the line discipline to the standard terminal line discipline TTYDISC.
new Same as tty.
old Same as tty.
brk value Same as the control character eol.
cbreak If set, enables brkint, ixon, imaxbel, opost, isig, iexten, and -icanon. If unset, same as sane.
The converse of ixany.
flush value Same as the control character discard.
The converse of opost.
Same as echoprt.
rprnt value Same as the control character redisplay.
The converse of oxtabs.
Same as ixoff.
DIAGNOSTICS exits 0 on success, and > 0 if an error occurs. LEGACY DESCRIPTION In legacy operation, the bs[01], cr[0-3], ff[01], nl[01], tab[0-3], and vt[01] control modes are not accepted, nor are ocrnl
-ocrnl, ofdel (-ofdel, ofill (-ofill, onlret (-onlret, and onocr
-onocr. SEE ALSO termios(4, compat(5